/**用法
 * Lunar.toSolar(2016, 6, 3); 农历转化公历
 * Lunar.toLunar(2016, 7, 6); 公历转化农历
 */
var Lunar = {
  selectDateType: 2,
  MIN_YEAR: 1891,
  MAX_YEAR: 2100,
  lunarInfo: [
    [0, 2, 9, 21936],
    [6, 1, 30, 9656],
    [0, 2, 17, 9584],
    [0, 2, 6, 21168],
    [5, 1, 26, 43344],
    [0, 2, 13, 59728],
    [0, 2, 2, 27296],
    [3, 1, 22, 44368],
    [0, 2, 10, 43856],
    [8, 1, 30, 19304],
    [0, 2, 19, 19168],
    [0, 2, 8, 42352],
    [5, 1, 29, 21096],
    [0, 2, 16, 53856],
    [0, 2, 4, 55632],
    [4, 1, 25, 27304],
    [0, 2, 13, 22176],
    [0, 2, 2, 39632],
    [2, 1, 22, 19176],
    [0, 2, 10, 19168],
    [6, 1, 30, 42200],
    [0, 2, 18, 42192],
    [0, 2, 6, 53840],
    [5, 1, 26, 54568],
    [0, 2, 14, 46400],
    [0, 2, 3, 54944],
    [2, 1, 23, 38608],
    [0, 2, 11, 38320],
    [7, 2, 1, 18872],
    [0, 2, 20, 18800],
    [0, 2, 8, 42160],
    [5, 1, 28, 45656],
    [0, 2, 16, 27216],
    [0, 2, 5, 27968],
    [4, 1, 24, 44456],
    [0, 2, 13, 11104],
    [0, 2, 2, 38256],
    [2, 1, 23, 18808],
    [0, 2, 10, 18800],
    [6, 1, 30, 25776],
    [0, 2, 17, 54432],
    [0, 2, 6, 59984],
    [5, 1, 26, 27976],
    [0, 2, 14, 23248],
    [0, 2, 4, 11104],
    [3, 1, 24, 37744],
    [0, 2, 11, 37600],
    [7, 1, 31, 51560],
    [0, 2, 19, 51536],
    [0, 2, 8, 54432],
    [6, 1, 27, 55888],
    [0, 2, 15, 46416],
    [0, 2, 5, 22176],
    [4, 1, 25, 43736],
    [0, 2, 13, 9680],
    [0, 2, 2, 37584],
    [2, 1, 22, 51544],
    [0, 2, 10, 43344],
    [7, 1, 29, 46248],
    [0, 2, 17, 27808],
    [0, 2, 6, 46416],
    [5, 1, 27, 21928],
    [0, 2, 14, 19872],
    [0, 2, 3, 42416],
    [3, 1, 24, 21176],
    [0, 2, 12, 21168],
    [8, 1, 31, 43344],
    [0, 2, 18, 59728],
    [0, 2, 8, 27296],
    [6, 1, 28, 44368],
    [0, 2, 15, 43856],
    [0, 2, 5, 19296],
    [4, 1, 25, 42352],
    [0, 2, 13, 42352],
    [0, 2, 2, 21088],
    [3, 1, 21, 59696],
    [0, 2, 9, 55632],
    [7, 1, 30, 23208],
    [0, 2, 17, 22176],
    [0, 2, 6, 38608],
    [5, 1, 27, 19176],
    [0, 2, 15, 19152],
    [0, 2, 3, 42192],
    [4, 1, 23, 53864],
    [0, 2, 11, 53840],
    [8, 1, 31, 54568],
    [0, 2, 18, 46400],
    [0, 2, 7, 46752],
    [6, 1, 28, 38608],
    [0, 2, 16, 38320],
    [0, 2, 5, 18864],
    [4, 1, 25, 42168],
    [0, 2, 13, 42160],
    [10, 2, 2, 45656],
    [0, 2, 20, 27216],
    [0, 2, 9, 27968],
    [6, 1, 29, 44448],
    [0, 2, 17, 43872],
    [0, 2, 6, 38256],
    [5, 1, 27, 18808],
    [0, 2, 15, 18800],
    [0, 2, 4, 25776],
    [3, 1, 23, 27216],
    [0, 2, 10, 59984],
    [8, 1, 31, 27432],
    [0, 2, 19, 23232],
    [0, 2, 7, 43872],
    [5, 1, 28, 37736],
    [0, 2, 16, 37600],
    [0, 2, 5, 51552],
    [4, 1, 24, 54440],
    [0, 2, 12, 54432],
    [0, 2, 1, 55888],
    [2, 1, 22, 23208],
    [0, 2, 9, 22176],
    [7, 1, 29, 43736],
    [0, 2, 18, 9680],
    [0, 2, 7, 37584],
    [5, 1, 26, 51544],
    [0, 2, 14, 43344],
    [0, 2, 3, 46240],
    [4, 1, 23, 46416],
    [0, 2, 10, 44368],
    [9, 1, 31, 21928],
    [0, 2, 19, 19360],
    [0, 2, 8, 42416],
    [6, 1, 28, 21176],
    [0, 2, 16, 21168],
    [0, 2, 5, 43312],
    [4, 1, 25, 29864],
    [0, 2, 12, 27296],
    [0, 2, 1, 44368],
    [2, 1, 22, 19880],
    [0, 2, 10, 19296],
    [6, 1, 29, 42352],
    [0, 2, 17, 42208],
    [0, 2, 6, 53856],
    [5, 1, 26, 59696],
    [0, 2, 13, 54576],
    [0, 2, 3, 23200],
    [3, 1, 23, 27472],
    [0, 2, 11, 38608],
    [11, 1, 31, 19176],
    [0, 2, 19, 19152],
    [0, 2, 8, 42192],
    [6, 1, 28, 53848],
    [0, 2, 15, 53840],
    [0, 2, 4, 54560],
    [5, 1, 24, 55968],
    [0, 2, 12, 46496],
    [0, 2, 1, 22224],
    [2, 1, 22, 19160],
    [0, 2, 10, 18864],
    [7, 1, 30, 42168],
    [0, 2, 17, 42160],
    [0, 2, 6, 43600],
    [5, 1, 26, 46376],
    [0, 2, 14, 27936],
    [0, 2, 2, 44448],
    [3, 1, 23, 21936],
    [0, 2, 11, 37744],
    [8, 2, 1, 18808],
    [0, 2, 19, 18800],
    [0, 2, 8, 25776],
    [6, 1, 28, 27216],
    [0, 2, 15, 59984],
    [0, 2, 4, 27424],
    [4, 1, 24, 43872],
    [0, 2, 12, 43744],
    [0, 2, 2, 37600],
    [3, 1, 21, 51568],
    [0, 2, 9, 51552],
    [7, 1, 29, 54440],
    [0, 2, 17, 54432],
    [0, 2, 5, 55888],
    [5, 1, 26, 23208],
    [0, 2, 14, 22176],
    [0, 2, 3, 42704],
    [4, 1, 23, 21224],
    [0, 2, 11, 21200],
    [8, 1, 31, 43352],
    [0, 2, 19, 43344],
    [0, 2, 7, 46240],
    [6, 1, 27, 46416],
    [0, 2, 15, 44368],
    [0, 2, 5, 21920],
    [4, 1, 24, 42448],
    [0, 2, 12, 42416],
    [0, 2, 2, 21168],
    [3, 1, 22, 43320],
    [0, 2, 9, 26928],
    [7, 1, 29, 29336],
    [0, 2, 17, 27296],
    [0, 2, 6, 44368],
    [5, 1, 26, 19880],
    [0, 2, 14, 19296],
    [0, 2, 3, 42352],
    [4, 1, 24, 21104],
    [0, 2, 10, 53856],
    [8, 1, 30, 59696],
    [0, 2, 18, 54560],
    [0, 2, 7, 55968],
    [6, 1, 27, 27472],
    [0, 2, 15, 22224],
    [0, 2, 5, 19168],
    [4, 1, 25, 42216],
    [0, 2, 12, 42192],
    [0, 2, 1, 53584],
    [2, 1, 21, 55592],
    [0, 2, 9, 54560],
  ],
  //是否闰年
  isLeapYear: function (year) {
    return (year % 4 == 0 && year % 100 != 0) || year % 400 == 0
  },
  //天干地支年
  lunarYear: function (year) {
    var gan = ['庚', '辛', '壬', '癸', '甲', '乙', '丙', '丁', '戊', '己'],
      zhi = ['申', '酉', '戌', '亥', '子', '丑', '寅', '卯', '辰', '巳', '午', '未'],
      str = year.toString().split('')
    return gan[str[3]] + zhi[year % 12]
  },
  //生肖年
  zodiacYear: function (year) {
    var zodiac = ['猴', '鸡', '狗', '猪', '鼠', '牛', '虎', '兔', '龙', '蛇', '马', '羊']
    return zodiac[year % 12]
  },
  //公历月份天数
  //@param year 阳历-年
  //@param month 阳历-月
  solarMonthDays: function (year, month) {
    var FebDays = this.isLeapYear(year) ? 29 : 28
    var monthHash = ['', 31, FebDays, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
    return monthHash[month]
  },
  //农历月份天数
  lunarMonthDays: function (year, month) {
    var monthData = this.lunarMonths(year)
    return monthData[month - 1]
  },
  //农历月份天数数组
  lunarMonths: function (year) {
    var yearData = this.lunarInfo[year - this.MIN_YEAR]
    var leapMonth = yearData[0]
    var bit = (+yearData[3]).toString(2)
    var months = []
    for (var i = 0; i < bit.length; i++) {
      months[i] = bit.substr(i, 1)
    }

    for (var k = 0, len = 16 - months.length; k < len; k++) {
      months.unshift('0')
    }

    months = months.slice(0, leapMonth == 0 ? 12 : 13)
    for (var i = 0; i < months.length; i++) {
      months[i] = +months[i] + 29
    }
    return months
  },
  //农历每年的天数
  //@param year 农历年份
  lunarYearDays: function (year) {
    var monthArray = this.lunarYearMonths(year)
    var len = monthArray.length
    return monthArray[len - 1] == 0 ? monthArray[len - 2] : monthArray[len - 1]
  },
  //
  lunarYearMonths: function (year) {
    var monthData = this.lunarMonths(year)
    var res = []
    var temp = 0
    var yearData = this.lunarInfo[year - this.MIN_YEAR]
    var len = yearData[0] == 0 ? 12 : 13
    for (var i = 0; i < len; i++) {
      temp = 0
      for (j = 0; j <= i; j++) {
        temp += monthData[j]
      }
      res.push(temp)
    }
    return res
  },
  //获取闰月
  //@param year 农历年份
  leapMonth: function (year) {
    var yearData = this.lunarInfo[year - this.MIN_YEAR]
    return yearData[0]
  },
  //计算农历日期与正月初一相隔的天数
  betweenLunarDays: function (year, month, day) {
    var yearMonth = this.lunarMonths(year)
    var res = 0
    for (var i = 1; i < month; i++) {
      res += yearMonth[i - 1]
    }
    res += day - 1
    return res
  },
  //计算2个阳历日期之间的天数
  //@param year 阳历年
  //@param month
  //@param day
  //@param l_month 阴历正月对应的阳历月份
  //@param l_day   阴历初一对应的阳历天
  betweenSolarDays: function (year, month, day, l_month, l_day) {
    var time1 = new Date(year + '/' + month + '/' + day).getTime(),
      time2 = new Date(year + '/' + l_month + '/' + l_day).getTime()
    return Math.ceil((time1 - time2) / 24 / 3600 / 1000)
  },
  //根据距离正月初一的天数计算阴历日期
  //@param year 阳历年
  //@param between 天数
  lunarByBetween: function (year, between) {
    var lunarArray = [],
      yearMonth = [],
      t = 0,
      e = 0,
      leapMonth = 0,
      m = ''
    if (between == 0) {
      t = 1
      e = 1
      m = '正月'
    } else {
      year = between > 0 ? year : year - 1
      yearMonth = this.lunarYearMonths(year)
      leapMonth = this.leapMonth(year)
      between = between > 0 ? between : this.lunarYearDays(year) + between
      for (var i = 0; i < 13; i++) {
        if (between == yearMonth[i]) {
          t = i + 2
          e = 1
          break
        } else if (between < yearMonth[i]) {
          t = i + 1
          e = between - (yearMonth[i - 1] ? yearMonth[i - 1] : 0) + 1
          break
        }
      }

      m =
        leapMonth != 0 && t == leapMonth + 1
          ? '闰' + this.chineseMonth(t - 1)
          : this.chineseMonth(leapMonth != 0 && leapMonth + 1 < t ? t - 1 : t)
    }
    lunarArray.push(year, t, e) //年 月 日
    lunarArray.push(this.lunarYear(year), this.zodiacYear(year), m, this.chineseNumber(e)) //天干地支年 生肖年 月份 日
    lunarArray.push(leapMonth) //闰几月
    return lunarArray
  },
  //中文月份
  chineseMonth: function (month) {
    var monthHash = [
      '',
      '正月',
      '二月',
      '三月',
      '四月',
      '五月',
      '六月',
      '七月',
      '八月',
      '九月',
      '十月',
      '冬月',
      '腊月',
    ]
    return monthHash[month]
  },
  //中文日期
  chineseNumber: function (num) {
    var dateHash = ['', '一', '二', '三', '四', '五', '六', '七', '八', '九', '十']
    if (num <= 10) {
      res = '初' + dateHash[num]
    } else if (num > 10 && num < 20) {
      res = '十' + dateHash[num - 10]
    } else if (num == 20) {
      res = '二十'
    } else if (num > 20 && num < 30) {
      res = '廿' + dateHash[num - 20]
    } else if (num == 30) {
      res = '三十'
    }
    return res
  },
  //转换农历
  toLunar: function (year, month, day) {
    this.selectDateType = 2
    var yearData = this.lunarInfo[year - this.MIN_YEAR]
    if (year == this.MIN_YEAR && month <= 2 && day <= 9) {
      return [1891, 1, 1, '辛卯', '兔', '正月', '初一']
    }
    return this.lunarByBetween(
      year,
      this.betweenSolarDays(year, month, day, yearData[1], yearData[2])
    )
  },
  //转换公历
  //@param year  阴历-年
  //@param month 阴历-月，闰月处理：例如如果当年闰五月，那么第二个五月就传六月，相当于阴历有13个月
  //@param date  阴历-日
  toSolar: function (year, month, day) {
    this.selectDateType = 1
    var yearData = this.lunarInfo[year - this.MIN_YEAR]
    var between = this.betweenLunarDays(year, month, day)
    var ms = new Date(year + '/' + yearData[1] + '/' + yearData[2]).getTime()
    var s = ms + between * 24 * 60 * 60 * 1000
    var d = new Date()
    d.setTime(s)
    year = d.getFullYear()
    month = d.getMonth() + 1
    day = d.getDate()
    return [year, month, day]
  },
}

// console.log('test, 公历转农历', Lunar.toLunar(2023, 6, 20))
// console.log('test, 公历转农历', Lunar.toLunar(2023, 1, 20))
